阅读说明：本技术 一种双气缸压缩机泵体以及双气缸压缩机 (Double-cylinder compressor pump body and double-cylinder compressor ) 是由 邓燕 龚沛 张冬梅 于 2020-12-10 设计创作，主要内容包括：本发明涉及一种双气缸压缩机泵体以及双气缸压缩机,所述双气缸压缩机泵体包括第二轴承以及泵油盖；所述第二轴承包括第二轴承柄部以及第二轴承法兰,所述第二轴承法兰远离所述第一轴承的一侧表面开设有凹槽；所述泵油盖包括盖体、固定板,所述泵油盖可拆卸式固定于所述第二轴承,所述固定板与所述第二轴承法兰端面接触,并与所述凹槽围合形成排气腔,其用以容纳所述泵体内产生的高压气体,避免了现有技术中在所述泵油盖处设置凸起,进而容易导致所述凸起与螺栓固定位置的衔接处因局部应力过大而造成裂纹或者破裂的问题,延长了所述泵油盖的使用寿命,且避免了通过增厚等方式对所述泵油盖进行结构加强所带来的加工难度增加及成本增加的问题。(The invention relates to a double-cylinder compressor pump body and a double-cylinder compressor, wherein the double-cylinder compressor pump body comprises a second bearing and a pump oil cover; the second bearing comprises a second bearing handle part and a second bearing flange, and a groove is formed in the surface of one side, far away from the first bearing, of the second bearing flange; pump oil lid is including lid, fixed plate, the pump oil lid is detachable to be fixed in the second bearing, the fixed plate with second bearing flange end face contacts, and with the recess is enclosed to close and is formed the exhaust chamber, and it is used for holding the high-pressure gas that produces in the pump body has avoided among the prior art pump oil lid department sets up the arch, and then leads to easily protruding and bolt fastening position's linking department causes the problem of crackle or fracture because of local stress is too big, has prolonged pump oil lid's life, and has avoided right through modes such as bodiness pump oil lid carries out the processing degree of difficulty that the structure was strengthened and brings and increases the problem of cost-push.)

1. The utility model provides a two cylinder compressor pump bodies which characterized in that: the oil pump comprises a first bearing, a second bearing, a first cylinder, a second cylinder, a middle plate, a first piston, a second piston, a crankshaft and an oil pump cover;

the first bearing, the first cylinder, the middle plate, the second cylinder and the second bearing are detachably fixed in sequence and enclose two independent refrigerant compression working spaces, and the first piston and the second piston are movably arranged in the two refrigerant compression working spaces respectively; the crankshaft movably penetrates through the inner hole of the first bearing and the inner hole of the second bearing and can drive the first piston and the second piston to reciprocate and complete refrigerant compression; a crankshaft pump oil hole is formed in the crankshaft along the axial direction;

the second bearing comprises a second bearing handle part and a second bearing flange, and the second bearing flange is annularly arranged on the outer side of one end of the second bearing handle part; a plurality of grooves are formed in the end face, facing the pump oil cover, of one side of the second bearing flange;

the oil pumping cover comprises a cover body, a fixing plate and an oil suction pipe; the cover body is of a hollow structure, is fixedly arranged at the center of the fixing plate and comprises a first cylindrical structure and a second cylindrical structure, the first cylindrical structure is fixedly communicated with the second cylindrical structure through a connecting part, and the outer diameter of the second cylindrical structure is not smaller than the inner diameter of the first cylindrical structure; the fixing plate is of a plate-shaped structure and is annularly arranged on the outer side of the end part of the second cylindrical structure; one end of the oil suction pipe is fixedly arranged in the inner hole of the first cylindrical structure in a penetrating mode and communicated with the crankshaft pump oil hole, and the other end of the oil suction pipe is communicated with the double-cylinder compressor oil pool;

the pump oil cover is detachably fixed on the second bearing, and the connecting part is in contact with the end face of the handle part of the second bearing; the fixed plate is in contact with the end face of the second bearing flange and forms an exhaust cavity with the groove in an enclosing manner; the exhaust cavity is provided with a valve seat exhaust port and a plurality of exhaust through holes and is movably communicated with the refrigerant compression working space through the valve seat exhaust port; the first cylinder, the middle plate, the second cylinder and the first bearing are provided with an exhaust channel in a penetrating mode, and the exhaust cavity is communicated with the exhaust channel through the exhaust through hole.

2. The double cylinder compressor pump body according to claim 1, characterized in that: the groove is of an annular structure and is formed by encircling the second bearing flange and the second bearing handle.

3. The double cylinder compressor pump body according to claim 2, characterized in that: the second bearing further comprises a seal ring; an annular groove is formed in the end face of the handle part of the second bearing, and the sealing ring is arranged in the annular groove and matched with the annular groove; when the pump oil cover is detachably fixed on the second bearing, the sealing ring is abutted to the connecting part.

4. The double cylinder compressor pump body according to claim 1, characterized in that: the pump oil cover, the second bearing and the second cylinder are detachably fixed through fixing bolts.

5. The double cylinder compressor pump body according to claim 4, characterized in that: the second cylinder is towards the surface of second bearing one side has seted up a plurality of first screws along circumference, the second bearing flange corresponds first screw position department runs through and has seted up first fixed orifices, the fixed plate corresponds first fixed orifices position department runs through and has seted up the second fixed orifices, fixing bolt wears to locate in proper order the second fixed orifices first fixed orifices and first screw.

6. The double cylinder compressor pump body according to claim 1, characterized in that: the oil suction pipe is of a three-section structure and comprises a first pipe section far away from the cover body, and the extending direction of the first pipe section is parallel to the axial direction of the crankshaft and faces the second cylinder.

7. The double cylinder compressor pump body according to claim 6, characterized in that: the first bearing comprises a first bearing handle part and a first bearing flange, and the first bearing flange is annularly arranged on the outer side of one end of the first bearing handle part; the first bearing flange is provided with a first oil suction hole in a penetrating manner along the axial direction of the crankshaft; a second oil suction hole and a third oil suction hole respectively penetrate through the first cylinder and the second cylinder at positions corresponding to the first oil suction hole; the end part of the first pipe section corresponds to the third oil suction hole in position and is sequentially communicated with the first oil suction hole, the second oil suction hole and the third oil suction hole.

8. The double cylinder compressor pump body according to claim 1, characterized in that: the second cylindrical structure and the second bearing handle are in clearance fit, and the width of the fit clearance is not more than 2 mm.

9. The double cylinder compressor pump body according to claim 3, characterized in that: the cover body and the fixing plate are integrally formed; the sealing ring is a rubber part.

10. A kind of double-cylinder compressor, characterized by: comprising a double cylinder compressor pump body according to any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of compressors, in particular to a double-cylinder compressor pump body and a double-cylinder compressor.

Background

The compressor is generally composed of an upper cover, a lower cover, a housing, a motor fixed inside to provide rotational power, and a pump body to compress refrigerant. In particular, in the case of a dual-cylinder compressor, an oil cap needs to be mounted on a lower bearing handle portion, so that lubricating oil can be continuously supplied to each part of the pump body, which is prone to frictional wear, during operation of the compressor, thereby ensuring long-term stable operation of the compressor.

In the prior art, a pump oil cover is equivalent to the existing silencing cover in structure, a cover body of the pump oil cover covers the whole lower bearing end face and is matched and fixed with the lower bearing end face through screws fixed by a pump body, for a machine type with exhaust holes on a lower bearing, because a containing space is reserved for high-pressure gas generated after a refrigerant is compressed in a cylinder assembly, a bulge with a certain height is arranged at the pump oil cover in the prior art to form an exhaust cavity by enclosing the pump oil cover and the lower bearing, but the pump oil cover needs to be fixed with the lower bearing through a bolt, the stress on the joint of the bulge of the pump oil cover and the bolt fixing part is larger, the problem of tensile deformation and even cracking or breaking of the pump oil cover is easy to occur, and the production management is difficult to perform; and the pump oil cover structure is comparatively complicated, through increasing the mode that the thickness of pump oil cover improves overall structure intensity can lead to processing degree of difficulty and processing cost to improve, also can lead to its space that occupies great simultaneously, influences the miniaturized realization of compressor.

Disclosure of Invention

Accordingly, an object of the present invention is to provide a pump body of a twin-cylinder compressor, which has advantages of simple structure, high mechanical strength and low cost.

A double-cylinder compressor pump body comprises a first bearing, a second bearing, a first cylinder, a second cylinder, a middle plate, a first piston, a second piston, a crankshaft and a pump oil cover;

the first bearing, the first cylinder, the middle plate, the second cylinder and the second bearing are detachably fixed in sequence and enclose two independent refrigerant compression working spaces, and the first piston and the second piston are movably arranged in the two refrigerant compression working spaces respectively; the crankshaft movably penetrates through the inner hole of the first bearing and the inner hole of the second bearing and can drive the first piston and the second piston to reciprocate and complete refrigerant compression; a crankshaft pump oil hole is formed in the crankshaft along the axial direction;

the second bearing comprises a second bearing handle part and a second bearing flange, and the second bearing flange is annularly arranged on the outer side of one end of the second bearing handle part; a plurality of grooves are formed in the end face, facing the pump oil cover, of one side of the second bearing flange;

the oil pumping cover comprises a cover body, a fixing plate and an oil suction pipe; the cover body is of a hollow structure, is fixedly arranged at the center of the fixing plate and comprises a first cylindrical structure and a second cylindrical structure, the first cylindrical structure is fixedly communicated with the second cylindrical structure through a connecting part, and the outer diameter of the second cylindrical structure is not smaller than the inner diameter of the first cylindrical structure; the fixing plate is of a plate-shaped structure and is annularly arranged on the outer side of the end part of the second cylindrical structure; one end of the oil suction pipe is fixedly arranged in the inner hole of the first cylindrical structure in a penetrating mode and communicated with the crankshaft pump oil hole, and the other end of the oil suction pipe is communicated with the double-cylinder compressor oil pool;

the pump oil cover is detachably fixed on the second bearing, and the connecting part is in contact with the end face of the handle part of the second bearing; the fixed plate is in contact with the end face of the second bearing flange and forms an exhaust cavity with the groove in an enclosing manner; the exhaust cavity is provided with a valve seat exhaust port and a plurality of exhaust through holes and is movably communicated with the refrigerant compression working space through the valve seat exhaust port; the first cylinder, the middle plate, the second cylinder and the first bearing are provided with an exhaust channel in a penetrating mode, and the exhaust cavity is communicated with the exhaust channel through the exhaust through hole.

The double-cylinder compressor pump body provided by the embodiment of the invention has the advantages that the end face of the second bearing flange is provided with the groove, the pump oil cover, the second bearing flange and the second cylinder are detachably fixed, the fixing plate and the groove are enclosed to form the exhaust cavity for accommodating high-pressure refrigerant gas generated in the second cylinder, and the space of the periphery of the handle part at the second bearing is fully utilized, so that the problem that in the prior art, a bulge with a large area is arranged at the pump oil cover, the joint of the bulge and the bolt fixing position is easy to crack or break due to overlarge local stress is avoided, the service life of the pump oil cover is prolonged, the structure is simple, the mechanical strength is high, and the problems of processing difficulty increase and cost increase caused by structural reinforcement of the pump oil cover in a thickening mode and the like are avoided, and meanwhile, the occupied space of the pump body of the double-cylinder compressor is avoided being increased, and the miniaturization design of the double-cylinder compressor is facilitated.

Furthermore, the groove is of an annular structure and is formed by enclosing the second bearing flange and the second bearing handle, the accommodating space of the groove can be enlarged as much as possible, the space is effectively utilized, and the structure is more compact.

Further, the second bearing further comprises a seal ring; an annular groove is formed in the end face of the handle part of the second bearing, and the sealing ring is arranged in the annular groove and matched with the annular groove; when the pump oil cover is detachably fixed on the second bearing, the sealing ring is abutted to the connecting part. The annular groove and the sealing ring are arranged, so that the sealing performance between the pump oil cover and the second bearing can be further enhanced, and the leakage of lubricating oil is avoided.

Further, the pump oil cover, the second bearing and the second cylinder are detachably fixed through fixing bolts.

Furthermore, a plurality of first screw holes are uniformly formed in the surface, facing one side of the second bearing, of the second cylinder along the circumferential direction, a first fixing hole is formed in the position, corresponding to the first screw hole, of the second bearing flange in a penetrating mode, a second fixing hole is formed in the position, corresponding to the first fixing hole, of the fixing plate in a penetrating mode, and the fixing bolt sequentially penetrates through the second fixing hole, the first fixing hole and the first screw hole. Through fixing bolt the second fixed orifices first screw and the cooperation fixed stability of first fixed orifices is good, and the dismouting simple operation.

Furthermore, the oil suction pipe is of a three-section structure and comprises a first pipe section far away from the cover body, the extending direction of the first pipe section is parallel to the axial direction of the crankshaft and is arranged towards the second cylinder, the length of the inlet end of the oil suction pipe immersed in the oil pool can be ensured when the pump body of the double-cylinder compressor is applied to the horizontal compressor, liquid in the oil pool of the horizontal compressor easily flows in a large range, and the oil suction pipe is of a three-section structure and can ensure that lubricating oil can be smoothly supplied to each contact friction position in the pump body through the oil suction pipe to lubricate when the liquid level fluctuates greatly, so that abrasion is avoided.

The first bearing comprises a first bearing handle part and a first bearing flange, and the first bearing flange is annularly arranged on the outer side of one end of the first bearing handle part; the first bearing flange is provided with a first oil suction hole in a penetrating manner along the axial direction of the crankshaft; a second oil suction hole and a third oil suction hole respectively penetrate through the first cylinder and the second cylinder at positions corresponding to the first oil suction hole; the end part of the first pipe section corresponds to the third oil suction hole in position and is sequentially communicated with the first oil suction hole, the second oil suction hole and the third oil suction hole. The first oil suction hole, the second oil suction hole and the third oil suction hole are correspondingly arranged, so that lubricating oil can conveniently flow back to the oil pool, the first oil suction hole, the second oil suction hole, the third oil suction hole and the end part of the first pipe section are correspondingly arranged, and the returned lubricating oil can conveniently flow back to the positions of contact friction in the pump body again from the oil suction pipe for lubrication.

Further, the second cylindrical structure and the second bearing handle are in clearance fit, and the width of the fit clearance is not more than 2 mm. The clearance fit arrangement can enable the structure to be compact and meanwhile facilitate the fixed installation operation of the pump oil cover and the second bearing, and the assembly efficiency is improved.

Furthermore, the cover body and the fixing plate are integrally formed, so that the mechanical strength is high, and the processing procedures can be saved; the sealing ring is a rubber part, is soft in performance, good in sealing performance and good in compatibility with a refrigerant for the compressor.

In the double-cylinder compressor pump body of the embodiment of the invention, the groove is formed in the end face of the second bearing flange, and when the pump oil cover, the second bearing flange and the second cylinder are detachably fixed, the fixing plate and the groove enclose to form the exhaust cavity for containing high-pressure refrigerant gas generated in the air pump assembly, and the space of the periphery of the handle part at the second bearing is fully utilized, so that the problem that in the prior art, a bulge with a large area is arranged at the pump oil cover, and further the joint of the bulge and the bolt fixing position is easy to crack or break due to overlarge local stress is avoided, the service life of the pump oil cover is prolonged, the increase of processing difficulty and the increase of cost caused by the structural reinforcement of the pump oil cover in a thickening mode are avoided, and the shape structure of the groove is further combined, the occupied space of the pump body of the double-cylinder compressor can be prevented from being increased, and the miniaturization design of the double-cylinder compressor is facilitated; in addition, in the preferred embodiment, the annular groove and the sealing ring are arranged, so that the sealing performance between the pump oil cover and the second bearing is effectively improved, the leakage of lubricating oil is avoided, the shape and the position arrangement of the oil suction pipe are preferably limited, the smoothness of a supply channel and a return channel of the lubricating oil is kept, and the oil suction pipe is suitable for a horizontal compressor system and ensures the lubricating effect. The double-cylinder compressor pump body provided by the embodiment of the invention is simple in structure and high in mechanical strength.

In addition, the embodiment of the invention also provides a double-cylinder compressor, which comprises the double-cylinder compressor pump body. The double-cylinder compressor disclosed by the embodiment of the invention has the advantages of simple structure, high mechanical strength, long service life, high processing and assembling efficiency, good lubricating effect in the working process and difficulty in structural damage caused by dry friction.

For a better understanding and practice, the invention is described in detail below with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic cross-sectional view of a pump body of a twin-cylinder compressor according to embodiment 1 of the present invention;

FIG. 2 is a schematic view of an angle structure of a second bearing according to embodiment 1 of the present invention;

fig. 3 is a schematic structural diagram of a second bearing angle according to embodiment 1 of the present invention;

fig. 4 is an exploded view of the pump oil cap and the second bearing structure according to embodiment 1 of the present invention;

FIG. 5 is a schematic side view of the pump oil cap according to embodiment 1 of the present invention;

FIG. 6 is a schematic cross-sectional view of a pump body of a dual cylinder compressor according to embodiment 2 of the present invention;

fig. 7 is an exploded view of the pump oil cap and the second bearing structure according to embodiment 2 of the present invention;

fig. 8 is a schematic side view of the pump oil cap according to embodiment 2 of the present invention.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Example 1

Referring to fig. 1-3, fig. 1 is a schematic sectional view of a pump body of a dual-cylinder compressor according to embodiment 1 of the present invention, fig. 2 is a schematic structural view of a second bearing angle according to embodiment 1 of the present invention, and fig. 3 is a schematic structural view of a second bearing angle according to embodiment 1 of the present invention, as shown in the figure, embodiment 1 of the present invention provides a pump body of a dual-cylinder compressor, which includes a first bearing 10, a second bearing 20, a first cylinder 30, a second cylinder 40, a middle plate 50, a first piston 60, a second piston 70, a crankshaft 80, and a pump oil cover 90.

The first bearing 10, the first cylinder 30, the middle plate 50, the second cylinder 40 and the second bearing 20 are detachably fixed in sequence and enclose two independent refrigerant compression working spaces, and the first piston 60 and the second piston 70 are movably arranged in the two refrigerant compression working spaces respectively; the crankshaft 80 movably penetrates through the inner hole of the first bearing 10 and the inner hole of the second bearing 20, and can drive the first piston 60 and the second piston 70 to reciprocate and complete the refrigerant compression work; a crankshaft pump oil hole 82 is provided in the crankshaft 80 in the axial direction.

The second bearing 20 comprises a second bearing handle 22 and a second bearing flange 24, and the second bearing flange 24 is annularly arranged outside one end of the second bearing handle 22; the end face of the second bearing flange 24 facing the pump oil cover 90 is provided with a plurality of grooves 26.

Referring to fig. 4-5, fig. 4 is an exploded schematic view of the pump oil cover and the second bearing structure in embodiment 1 of the present invention, and fig. 5 is a side schematic view of the pump oil cover in embodiment 1 of the present invention, as shown in the figure, the pump oil cover 90 includes a cover body 92, a fixing plate 94 and an oil suction pipe 96; the cover 92 is a hollow structure, is fixedly disposed at the center of the fixing plate 94, and includes a first cylindrical structure 922 and a second cylindrical structure 924, the first cylindrical structure 922 is fixedly communicated with the second cylindrical structure 924 through a connecting portion 926, and the outer diameter of the second cylindrical structure 924 is not smaller than the inner diameter of the first cylindrical structure 922; the fixing plate 94 is a plate-shaped structure and is annularly arranged outside the end part of the second cylindrical structure 924; one end of the oil suction pipe 96 is fixedly arranged in the inner hole of the first cylindrical structure 922 in a penetrating mode and communicated with the crankshaft pump oil hole 82, and the other end of the oil suction pipe is communicated with the oil pool of the double-cylinder compressor.

The pump oil cover 90 is detachably fixed to the second bearing 20, and the connecting portion 926 is in contact with the end face of the second bearing handle 22; the fixing plate 94 is in contact with the end face of the second bearing flange 24 and encloses the groove 26 to form an exhaust cavity; the exhaust cavity is provided with a valve seat exhaust port 262 and a plurality of exhaust through holes 264, and the exhaust cavity is movably communicated with the refrigerant compression working space through the valve seat exhaust port 262; an exhaust passage is formed by the first cylinder 30, the middle plate 50, the second cylinder 40 and the first bearing 10, and the exhaust cavity is communicated with the exhaust passage through an exhaust through hole 264.

In the pump body of the double-cylinder compressor in embodiment 1 of the invention, the groove is formed in the end face of the second bearing flange, and when the pump oil cover, the second bearing flange and the second cylinder are detachably fixed, the fixing plate and the groove enclose to form the exhaust cavity for accommodating high-pressure refrigerant gas generated in the second cylinder, and the space on the periphery of the handle part at the second bearing is fully utilized, so that the problem that in the prior art, a bulge with a large area is arranged at the pump oil cover, and further, the joint of the bulge and the bolt fixing position is easy to crack or break due to overlarge local stress is avoided, the service life of the pump oil cover is prolonged, the structure is simple, the mechanical strength is high, and the problems of increased processing difficulty and increased cost caused by structural reinforcement of the pump oil cover through thickening and other modes are avoided, and meanwhile, the occupied space of the pump body of the double-cylinder compressor is avoided being increased, and the miniaturization design of the double-cylinder compressor is facilitated.

As an alternative embodiment, in the present embodiment, the groove 26 is a ring-shaped structure, and it is disposed around the second bearing shank 22, and in other embodiments, it may have other shapes, which is not limited to this example; it is further preferred that the recess 26 is formed by the second bearing flange 24 and the second bearing shank 22, and this arrangement can maximize the accommodation space of the recess 26, and effectively utilize the space, making the structure more compact.

As shown in fig. 5, in the present embodiment, the fixing plate 94 is a flat plate structure with a uniform thickness, and in other embodiments or in actual manufacturing, the fixing plate may be a stepped plate structure with a uniform thickness or a thickness difference, or a plate structure with an arc surface or an inclined surface, but is not limited to this example.

As an alternative embodiment, in the present embodiment, the second bearing 20 further comprises a sealing ring 28; an annular groove 222 is formed in the end face of the second bearing handle portion 22, and the sealing ring 28 is arranged in the annular groove 222 and matched with the annular groove 222; when the pump oil cover 90 is detachably fixed to the second bearing 20, the seal ring 28 abuts against the connection portion 926. The arrangement of the annular groove 222 and the sealing ring 28 can further enhance the sealing performance between the pump oil cover 90 and the second bearing 20, and avoid the leakage of the lubricating oil. Specifically, the sealing ring 28 is a rubber part, and more preferably a rubber part with good compatibility with the refrigerant for the compressor, such as NBR nitrile rubber material, and has excellent oil resistance, high wear resistance, good heat resistance, good sealing performance, and good compatibility with the refrigerant for the compressor.

As an alternative embodiment, in the present embodiment, the pump oil cover 90, the second bearing 20, and the second cylinder 40 are detachably fixed by the fixing bolt 98. Specifically, the surface of the second cylinder 40 facing the second bearing 20 has a plurality of first screw holes 42 formed along the circumferential direction, the second bearing flange 24 has a first fixing hole 242 formed through the position corresponding to the first screw hole 42, the fixing plate 94 has a second fixing hole 942 formed through the position corresponding to the first fixing hole 242, and the fixing bolt 98 sequentially passes through the second fixing hole 942, the first fixing hole 242 and the first screw hole 42. The fixing stability by the fixing bolt 98, the second fixing hole 942, the first screw hole 42 and the first fixing hole 242 is good, and the dismounting operation is convenient.

Example 2

Referring to fig. 6-8, fig. 6 is a schematic cross-sectional view of a pump body of a dual-cylinder compressor according to embodiment 2 of the present invention, fig. 7 is an exploded schematic view of a pump oil cap and a second bearing structure according to embodiment 2 of the present invention, and fig. 8 is a schematic side view of the pump oil cap according to embodiment 2 of the present invention. As shown in the figure, embodiment 2 of the present invention provides a pump body of a dual-cylinder compressor, which is different from embodiment 1 in that: the double-cylinder compressor is applied to a horizontal compressor, and the pump body of the double-cylinder compressor is arranged horizontally. As an alternative, in this embodiment, the oil suction pipe 96 is a three-segment structure, and includes a first pipe segment far from the cover 92, the extending direction of the first pipe segment is parallel to the axial direction of the crankshaft 80, and the first pipe segment is disposed toward the second cylinder 40, this arrangement enables the length of the inlet end of the oil suction pipe immersed in the oil sump to be ensured when the pump body of the double-cylinder compressor is applied to a horizontal compressor, and the liquid in the oil sump is prone to flow in a large range in the horizontal compressor, and the three-segment structure of the oil suction pipe ensures that the lubricating oil can be smoothly supplied to each contact friction position in the pump body through the oil suction pipe to lubricate when the liquid level fluctuates greatly, so as to avoid abrasion.

Further, the first bearing 10 includes a first bearing handle portion 12 and a first bearing flange 14, the first bearing flange 14 is annularly disposed outside one end of the first bearing handle portion 12; the first bearing flange 14 has a first oil suction hole 142 passing through along the axial direction of the crankshaft 80; the first cylinder 30 and the second cylinder 40 respectively penetrate through the first oil suction hole 142 to form a second oil suction hole 32 and a third oil suction hole 44; the end of the first pipe section corresponds to the third suction hole 44 and is in communication with the first suction hole 142, the second suction hole 32 and the third suction hole 44 in sequence. The first oil suction hole 142, the second oil suction hole 32 and the third oil suction hole 44 are correspondingly arranged so that the lubricating oil can conveniently flow back to the oil pool, and the first oil suction hole 142, the second oil suction hole 32, the third oil suction hole 44 and the end of the first pipe section are correspondingly arranged so that the flowing-back lubricating oil can conveniently flow back to each matching contact part of the pump body from the oil suction pipe 96, and the lubricating effect is realized.

The second cylindrical structure 924 is in clearance fit with the second bearing shank 22, and the width of the fit clearance is not greater than 2 mm. The cover 92 and the fixing plate 94 are integrally formed, so that the mechanical strength is high and the processing steps can be saved.

In the pump body of the double-cylinder compressor in embodiments 1 and 2 of the present invention, the groove is formed at the end surface of the second bearing flange, and when the pump oil cover, the second bearing flange and the second cylinder are detachably fixed, the fixing plate and the groove enclose the exhaust cavity to accommodate the high-pressure refrigerant gas generated in the air pump assembly, and the space at the periphery of the handle portion of the second bearing is fully utilized, thereby avoiding a problem that a joint between the protrusion and a bolt fixing position is cracked or cracked due to excessive local stress when a protrusion with a large area is provided at the pump oil cover in the prior art, prolonging the service life of the pump oil cover, avoiding increased processing difficulty and cost caused by structural reinforcement of the pump oil cover through thickening and the like, and further combining the shape structure of the groove, the occupied space of the pump body of the double-cylinder compressor can be prevented from being increased, and the miniaturization design of the double-cylinder compressor is facilitated; in addition, in the preferred embodiment, the annular groove and the sealing ring are arranged, so that the sealing performance between the pump oil cover and the second bearing is effectively improved, the leakage of lubricating oil is avoided, the shape and the position arrangement of the oil suction pipe are preferably limited, the smoothness of a supply channel and a return channel of the lubricating oil is kept, and the oil suction pipe is suitable for a horizontal compressor system and ensures the lubricating effect. The double-cylinder compressor pump body provided by the embodiment of the invention is simple in structure and high in mechanical strength.

Example 3

Embodiment 3 of the present invention provides a dual cylinder compressor, which includes the above-mentioned dual cylinder compressor pump body. The double-cylinder compressor disclosed by the embodiment 3 of the invention has the advantages of simple structure, high mechanical strength, long service life, high processing and assembling efficiency, good lubricating effect in the working process and difficulty in structural damage caused by dry friction.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.